Suspense meets sacrifice in the action-packed conclusion to New York Times bestselling author James Dashner's 13th Reality series.

Atticus Higginbottom--aka Tick--has known all along that when the battle for every reality is on the line, his role will be a crucial one. But he never could have imagined how this final challenge would go down. While Tick's friends Paul, Sofia, and Sato work together with the Realitants to fight the newest and biggest threat to the very fabric of all that exists, Tick finds himself alone with the villains responsible for the damage: Mistress Jane and Reginald Chu.

Each character faces unimaginable choices and death-defying odds in this breathless conclusion to a quirky, clever series. Ultimately, it will take a stunning sacrifice to save the day....